mysql_list_fields
(PHP 4, PHP 5, PECL mysql:1.0)
mysql_list_fields — List MySQL table fields
說明
Retrieves information about the given table name.
This function is deprecated. It is preferable to use mysql_query() to issue a SQL SHOW COLUMNS FROM table [LIKE 'name'] statement instead.
參數
- database_name
-
The name of the database that's being queried.
- table_name
-
The name of the table that's being queried.
- link_identifier
-
MySQL 的連接識別符。如果沒有指定,預設使用最後被 mysql_connect() 打開的連接。如果沒有找到該連接,函式會嘗試呼叫 mysql_connect() 建立連接並使用它。如果發生意外,沒有找到連接或無法建立連接,系統發出 E_WARNING 級別的警告信息。
Return值
A result pointer resource on success, or FALSE on failure.
The returned result can be used with mysql_field_flags(), mysql_field_len(), mysql_field_name() 和 mysql_field_type().
範例
Example#1 Alternate to deprecated mysql_list_fields()
<?php
$result = mysql_query("SHOW COLUMNS FROM sometable");
if (!$result) {
echo 'Could not run query: ' . mysql_error();
exit;
}
if (mysql_num_rows($result) > 0) {
while ($row = mysql_fetch_assoc($result)) {
print_r($row);
}
}
?>
上例的輸出類似於:
Array ( [Field] => id [Type] => int(7) [Null] => [Key] => PRI [Default] => [Extra] => auto_increment ) Array ( [Field] => email [Type] => varchar(100) [Null] => [Key] => [Default] => [Extra] => )
註釋
Note: 為了保證向下相容性,可以使用下面的別名,但不贊成使用它: mysql_listfields()